Summary: Rory has trouble understanding the Doctor at times.
The Doctor’s talking nonsense again; Rory smiles vaguely, letting it wash over him. He knows to the Doctor, what he’s telling them isn’t nonsense at all; it’s just difficult explaining certain things to people who don’t have advanced degrees in sciences that probably aren’t even taught on earth yet.
For his own sake, Rory has long since given up trying to follow the Time Lord’s convoluted ramblings, they just make his brain hurt, but he can’t completely tune them out either in case something important is mentioned.
Rory’s far from stupid, but he wishes the Doctor would use smaller words.